Question

In the question below, M means metal 1 while N means metal 2. Calculate LaTeX: \Delta Δ G0 (kJ/mole) for the spontaneous reaction at 25°C? Enter number to 2 decimal places

M2+(aq) + 2e- ⟶ M(s) E0=1.42 V

N4+(aq) + 4e- ⟶ N(s) E0=0.53 V

Answer 1

M2+(aq) + 2e- ⟶ M(s)    E0=1.42 V

N4+(aq) + 4e- ⟶ N(s)     E0=0.53 V

N(s) -------------->N4+(aq) + 4e-    E0 = -0.53v

2M2+(aq) + 4e- ⟶ 2M(s)      E0=1.42 V

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N(s) + 2M^2+ (aq) ---------> 2M(s) + N^4+(aq)     E0cell = 0.89v

   n = 4

Δ G0   = -nE0cell *F

           = -4*0.89*96500 = -343540J/mole = -343.54KJ/mole